I am wanting to use the Google Shopping Api from the github link below
https://github.com/bluevisiontec/GoogleShoppingApi
I have tried multiple times and followed all instructions without issue, but am getting a blank page in Admin. Error says:
a:5:{i:0;s:72:"Mage registry key "_singleton/googleshoppingapi/observer" already exists";i:1;s:1329:"#0 /home5/username/public_html/app/Mage.php(223): Mage::throwException('Mage registry k...')
#1 /home5/username/public_html/app/Mage.php(477): Mage::register('_singleton/goog...', false)
#2 /home5/username/public_html/includes/src/__default.php(22026): Mage::getSingleton('googleshoppinga...')
#3 /home5/username/public_html/app/Mage.php(448): Mage_Core_Model_App->dispatchEvent('controller_acti...', Array)
#4 /home5/username/public_html/includes/src/__default.php(14363): Mage::dispatchEvent('controller_acti...', Array)
#5 /home5/username/public_html/includes/src/Mage_Adminhtml_Controller_Action.php(160): Mage_Core_Controller_Varien_Action->preDispatch()
#6 /home5/username/public_html/includes/src/__default.php(14241): Mage_Adminhtml_Controller_Action->preDispatch()
#7 /home5/username/public_html/includes/src/__default.php(18698): Mage_Core_Controller_Varien_Action->dispatch('login')
#8 /home5/username/public_html/includes/src/__default.php(18228): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#9 /home5/username/public_html/includes/src/__default.php(21056): Mage_Core_Controller_Varien_Front->dispatch()
#10 /home5/username/public_html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#11 /home5/username/public_html/index.php(83): Mage::run('', 'store')
#12 {main}";s:3:"url";s:17:"/index.php/admin/";s:11:"script_name";s:10:"/index.php";s:4:"skin";s:5:"admin";}
Any ideas on how to fix this?